Dobby lever



March 13, 1928. 1,662,202

J. NORTHRbP DOBBY LEVER Filed Oct. 21, 1925 Patented Mar. 13, 1928.

UNITED sures PA'raNTfoF ics.

JONAS NORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO DRAPER CORPORATION, OF HOIEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

DOBBY LEVER.

I Application filed October-21, 1925. Serial No. 63,902.

The present invention relates to an improvement in dobby levers.

The object of the invention is to produce an improved construction of dobby lever,

inexpensive in form and convenient in use.

The invention consists in the dobby lever hereinafter described and particularly defined in the claims. 7

In the accompanying drawings illustrating the preferred form of the invention, Fig.

1 is a side elevation of the dobby lever and associated parts; Fig. 2 is a longitudinal sectional elevation of the end of the dobby lever; Fig. 3 is an edge view of the two parts of the dobby lever separated; Fig. 4 IS an edge view of the dobby lever with the fingers in position; and Fig. 5 is an enlarged side elevation of the end of the lever. The illustrated embodiment of the invention is described as follows: The dobby lever 1 is carried by the jack 2, being pivoted at its center thereto, and at the end of each dobby lever there are :pivotally attached dobby hooks 3 and 4. The dobby fingers 5 and 6 raise and lower the dobby hooks, the formerthrough the intervention of the push rod 7, and the latter by direct engagement with the hook. The dobby girts are shown at 8 and 9.

' Each dobby lever consists of two sheet metal plates or pieces, each exactly like the other. The plate or member 10 is exactly like the plate or member 11, but is associated with it in reverse position. The ends of the plates are provided with pintle holes 12 and 13, which receive the pintles 14 of the hooks 3 and 4. Each plate or member is provided with an offset bend 15, to offset it from the straight portion of the other plate or member when they are laid together, as shown in Fig. 4. Each plate or member is provided with a key-ho1e 16 and with a. key 17 near its ends. These keys are rotatably secured in the members or plates 10 and 11, and when turned into the position shown in Fig. 3, they register with the key holes 16 so that the two plates may be moved into close contact wit-h each other, as shown in Fig. 4. These keys are secured to the plates by rivets 18. e

The offset of each lever member is of such thickness that when it is associated with the other member, the space between the offset end and the straight end of the other member is somewhat greater than the thickness of the hook lever at that point, so that the hook lever is not bound between the ends of the members of the lever, but isvfreely supported upon its pintle therein. The location of the keys and key-holes near the ends of the lever secures the members together near the point where the hooks are attached, so as thereby to secure the stiffening efiect of the key and key-hole at the point where it i other plate 11 on the first, so that the holes 13 and 12 embrace the other ends of the pintles of the hooks. Then the keys are turned into the position shown in Fig. 5.

The space between the key 17 and the surface of the plate to which it is attached by the rivet 18, is. a tight fit to receive and tightly hold the metal of the otherplate, so that when turned to the position shown in Fig. 5, they holdfast in such position by friction. It is a simple matter to renewthe hooks or to renew the levers when occasion or wear demands. By simply removing the lever and hooks from the machine and turning the keys 17 through an angle of, F the members 10 and 11 come freely apart, and new levers may be substituted on the Y old hooks, or new hooks may be substituted for the old hooks, and the parts re-assembled and securely united together again by turning the keys into locking position.

Having thus described the invention, what I is claimed is:

1. A dobby lever for loomsconsisting of two similar members or plates associated together symmetrically, each provided with an offset at one end, a key-hole near one end, and a key near the other end adapted to enter the key-hole of the associated plate when in assembling position to be turned to lock the parts together.

2. A dobby lever for looms consisting of two plates touching each other from near one end to near the other end, the lever being provided near each end with a key in one plate and a key-hole in the other plate 

